Similar conversations have been taking place at major universities around the world, as dozens - 74, at the last count - rush to sign up. Science, engineering and technology courses have been in the vanguard of the movement, but offerings in management, humanities and the arts are growing in popularity (see 'MOOCs rising'). "In 25 years of observing higher education, I've never seen anything move this fast," says Mitchell Stevens, a sociologist at Stanford and one of the leaders of an ongoing, campus-wide discussion series known as Education's Digital Future.

Voki is an animation website . It is “ a free service that allows you to create personalized speaking avatars and use them on your blog, profiles and in email messages”. This web2.0 tool is very important in education as It enables teachers and students to express themselves on the web in their own voice , using a talking character.